Linux useful commands and how-to collections.

Remove duplicate dict from a list in python.

How to convert string to stream in java.

How to read content of a file into string in java.

Find max common divisor.

IP address classes (Class A, B, C) and subnetting (CIDR).

OSI model and DoD (TCP/IP) model in computer networking.

Setup selenium grid to use in robotframework for web browser automation testing.

It is good practice to use the with keyword when dealing with file objects. This has the advantage that the file is properly closed after its suite finishes, even if an exception is raised on the way. It is also much shorter than writing equivalent try-finally blocks.

Python multiprocessing.